Merge branch 'develop' of ssh://git@github.com/Dolibarr/dolibarr.git into develop

htdocs/comm/propal/class/propal.class.php

htdocs/commande/class/commande.class.php

htdocs/compta/facture/class/facture.class.php

htdocs/core/class/commonobject.class.php

htdocs/fourn/facture/fiche.php

htdocs/install/mysql/migration/3.1.0-3.2.0.sql

htdocs/install/mysql/tables/llx_product_price.sql

htdocs/projet/class/project.class.php